A major challenge for information theorists is to find a new measure of quantum correlations via quantum Fisher information. Actually, local quantum Fisher information has been introduced to treat discord-type quantum correlations in interferometric phase estimation [1]}. This quantifier allows us to better understand how non-classical correlations contribute to establishing accuracy in quantum estimation theory. It meets the criteria identifying discord type quantifiers that any good quantum correlation quantifier should satisfy. Indeed, it is non-negative and vanishes only for the classically correlated states. Also, it is invariant under any local unitary operation and coincides with the geometric quantum discord for any pure quantum states.
